note: because China's exchange rate is determine by fiat, rather than by market forces, the official exchange rate measure of GDP is not an accurate measure of China's output; GDP at the official exchange rate substantially understates the actual level of China's output vis-a-vis the rest of the world; in China's situation, GDP at purchasing power parity provides the best measure for comparing output across countries (2010 est.)

note: 21.5 million rural population live below the official "absolute poverty" line (approximately $90 per year); an additional 35.5 million rural population live above that level but below the official "low income" line (approximately $125 per year) (2007)